Mozilla took another step forward this week with its Firefox OS, launching two developer preview phones. Developed by Spain’s Geeksphone in partnership with Telefonica, the Keon is billed as “All you need to begin” while the the higher-end Peak is billed as “One step beyond.” Mozilla hopes that developers will use its Firefox OS developer smartphones to develop apps to build out the app ecosystem for the nascent operating system:

Developer preview phones will help make the mobile web more accessible to more people. Developers are critical to the web and to Mozilla’s mission to make the web accessible to everyone. Hundreds of millions of people worldwide use Firefox to discover, experience and connect to the Web. A web based on open standards and open technologies. We couldn’t have done this without web developers. Now we are working on bringing the power of the web to mobile, through Firefox OS, along with all the power of open standards and an open community, and once again, we’d like to invite web developers to join us.

Firefox OS Keon specifications:

Processor: 1GHz single-core Qualcomm Snapdragon S1 7225AB

Operating system: Mozilla Firefox OS

Cellular connectivity: Tri-band HSPA / quad-band EDGE

Other connectivity: GPS, 802.11 b/g/n Wi-Fi

Display: 3.5-inch HVGA (320×480)

Input: Multitouch capacitive touchscreen

Memory: 512MB ROM

Storage: 4GB onboard and MicroSD cards

Rear-facing camera: 3MP

Front-facing camera: None

Battery: 1,580mAh

Firefox OS Peak specifications:

Processor: 1.2GHz dual-core Qualcomm Snapdragon S4 MSM8225

Operating system: Mozilla Firefox OS

Cellular connectivity: Tri-band HSPA / quad-band EDGE

Other connectivity: GPS, 802.11 b/g/n Wi-Fi

Display: 4.3-inch qHD (540×960) IPS

Input: Multitouch capacitive touchscreen

Memory: 512MB ROM

Storage: 4GB onboard and MicroSD cards

Rear-facing camera: 8MP with flash

Front-facing camera: 2MP

Battery: 1,800mAh

Mozilla hopes to have the Keon and Peak out sometime in February. Developers interested in getting their hands on either the Keon or the Peak can subscribe to Geeksphone’s mailing list to be notified of when they become available.